package com.book.web;

import com.book.pojo.User;
import com.book.service.UserService;
import com.book.service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class LoginServlet extends HttpServlet {
private UserService userService=new UserServiceImpl();
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

//1.获取登录所需参数
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        //2.调用usrService.Login()处理业务
        User loginUser = userService.login(new User(null, username, password, null));
        //如果等于NUll说明登录失败
        if (loginUser == null) {
            //把错误信息，和回显的表单项信息，保存到Request域中
            req.setAttribute("msg","用户或密码错误！");
            req.setAttribute("username",username);
            //跳转回登录页面
            req.getRequestDispatcher("/pages/user/login.jsp").forward(req,resp);
        }else {
            //登录成功，跳转登录成功页面
            req.getRequestDispatcher("/pages/user/login_success.jsp").forward(req, resp);
        }

    }
}
